HMMT 二月 2007 · GEN1 赛 · 第 7 题
HMMT February 2007 — GEN1 Round — Problem 7
题目详情
- [ 4 ] Jack, Jill, and John play a game in which each randomly picks and then replaces a card from a standard 52 card deck, until a spades card is drawn. What is the probability that Jill draws the spade? (Jack, Jill, and John draw in that order, and the game repeats if no spade is drawn.)
解析
- [ 4 ] Jack, Jill, and John play a game in which each randomly picks and then replaces a card from a standard 52 card deck, until a spades card is drawn. What is the probability that Jill draws the spade? (Jack, Jill, and John draw in that order, and the game repeats if no spade is drawn.) 12 Answer: . Same as Combo #3. 37